Compatibility: Please make sure your coffee machine replacement filter matches your model number. Compatible with model CA6903, not suitable for model CA6702. Efficient Filtration: Ion exchange resin effectively prevents limescale deposits. In addition, premium activated carbon from coconut shells can absorb residual chlorine, improving the taste of your coffee (tested by a third-party laboratory). No Limescale Deposits: You don't need to descale your coffee machine. This coffee machine filter prevents limescale deposits by replacing calcium and magnesium ions in the water. It has been tested by a third-party laboratory to extend the maintenance interval of your coffee machine to 3 months. Replacement models: espresso machines with Aqua Clean filter cartridges CA6903/00, CA6903/01, CA6903/99, CA6903-00, CA6903-01, CA6903-99, CA6903. Note: The data are all measured manually, please allow 1-3cm error Due to differences in light and display, there may be some color differences, please